Trutnov weather in September

In September, Trutnov sees average daytime highs of 17°C and overnight lows near 8°C, with 66 mm of rain across 10.5 wet days and about 12.4 hours of daylight. It is the 4th-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 19°C in the first days to 15°C by the end. The sky is clear or mostly clear about 23% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 18 min at the start of September to 11 h 30 min by month's end. Set against the rest of the year, September is Trutnov's 4th-clearest and 9th-windiest month. For the whole year in context, see Trutnov's year-round climate.

Daytime high
17°
4th warmest
Overnight low
9th coldest
Rainfall
66 mm
10.5 wet days
Daylight
12 h 24 min
5:39 AM – 6:02 PM
Cloud cover
64%
4th clearest
Wind
10 km/h
9th windiest
Solar energy
3.13 kWh/m²
Travel score
5.1
out of 10

Trutnov is town in Czechia.

Air quality
Good
PM10 20.9 µg/m³ · 2019
Density
304/km²
people per km²
Founded
1260

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 19°C in the first days to 15°C by the end.

A typical September day in Trutnov reaches about 17°C in the afternoon and slips back to 8°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 11°C and 22°C. Set against its neighbours, September runs about 5°C cooler than August and about 6°C warmer than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
11910
21910
31910
41910
51810
61810
71810
8189
9189
10189
11179
12179
13179
14179
15178
16178
17168
18168
19168
20168
21168
22167
23157
24157
25157
26157
27157
28157
29147
30147

How September really feels in Trutnov

Once humidity and wind are folded in, September averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Trutnov weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-0° / -5°5211.49.48.30.0
Feb / -4°429.57.29.70.0
Mar / -1°5511.9611.50.4
Apr12° / 4410.6213.52.9
May17° / 7513.70.115.24.8
Jun20° / 11°8313.6016.15.6
Jul22° / 13°9615015.85.9
Aug22° / 12°7712.1014.36.3
Sep17° / 6610.5012.45.1
Oct11° / 5210.50.710.42.6
Nov / 489.94.18.70.3
Dec / -4°50117.57.80.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 23% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 61%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14258
24258
34258
44258
54258
64159
74258
84258
94258
104159
114258
124258
134159
144159
154060
164060
173961
183862
193862
203862
213862
223862
233763
243664
253664
263664
273565
283565
293466
303367

Chance of precipitation in September

Any precipitation

Trutnov gets around 66 mm of rain over 10.5 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 36% and peaks near 39% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
139
239
339
439
539
638
738
837
937
1036
1136
1235
1335
1434
1534
1634
1733
1833
1933
2033
2133
2233
2333
2433
2534
2634
2735
2836
2936
3037

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the dry band about 90% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
178193
279183
380182
481172
583161
684151
784151
885141
987130
1087130
1188120
1288120
1389110
1490100
1590100
169190
179280
189370
199370
209460
219550
229550
239640
249730
259730
269730
279820
289820
299820
309910

Wind in September

Winds average 10 km/h in September.

Across September, daily wind ranges from about 9 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 18 min at the start of September to 11 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 108 minutes over September. Sunrise moves from 5:16 AM to 6:02 AM, and sunset from 6:36 PM to 5:29 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.35:166:36
213.35:176:34
313.25:196:32
413.25:206:30
513.15:226:27
613.05:246:25
713.05:256:23
812.95:276:20
912.85:286:18
1012.85:306:16
1112.75:316:14
1212.65:336:11
1312.65:356:09
1412.55:366:07
1512.45:386:04
1612.45:396:02
1712.35:416:00
1812.25:435:57
1912.25:445:55
2012.15:465:53
2112.05:475:50
2212.05:495:48
2311.95:515:46
2411.95:525:43
2511.85:545:41
2611.75:555:39
2711.75:575:36
2811.65:595:34
2911.56:005:32
3011.56:025:29

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.13 kWh/m².

For context, solar energy here swings from a low near 0.71 kWh/m² to a high of 5.38 kWh/m² in June across the year — September's 3.13 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.8Moderate
23.7Moderate
33.7Moderate
43.6Moderate
53.6Moderate
63.5Moderate
73.5Moderate
83.5Moderate
93.4Moderate
103.4Moderate
113.3Moderate
123.3Moderate
133.3Moderate
143.2Moderate
153.2Moderate
163.1Moderate
173.1Moderate
183.0Moderate
193.0Moderate
203.0Moderate
212.9Moderate
222.9Moderate
232.8Moderate
242.8Moderate
252.7Moderate
262.7Moderate
272.6Moderate
282.6Moderate
292.5Moderate
302.5Moderate
Planning a trip in September

Is September a good time to visit Trutnov?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

5.1
Sightseeing
4th-best month of the year
1.1
Beach & pool
4th-best month of the year

September is a reasonable time to visit Trutnov for sightseeing.

What to pack for Trutnov in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, Trutnov sees daytime highs around 17°C and nights near 8°C. Worth packing: a warm layer and rain gear. About 11 days see rain.

a warm layerrain gear

UV index in Trutnov in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Trutnov peaks around June 20 at about 7 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 22 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 20UV 7Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar4Moderate
Apr4Moderate
May6High
Jun7Very high
Jul7High
Aug6High
Sep4Moderate
Oct2Moderate
Nov1Low
Dec1Low

Air quality in Trutnov in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Trutnov is worst in March — around 18 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodMar 2218 µg/m³Dec 1012 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb15Moderate
Mar18Moderate
Apr17Moderate
May16Moderate
Jun18Moderate
Jul16Moderate
Aug16Moderate
Sep14Moderate
Oct12Moderate
Nov12Good
Dec12Good
Location & terrain

Where is Trutnov?

Trutnov sits at 50.6°N, 15.9°E, 431 m above sea level, in Czechia. The nearest listed city is Dvůr Králové nad Labem, 16 km away.

Boguszów-GorceWałbrzychHradec KrálovéJelenia GóraNowa Ruda

Topography around Trutnov

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Trutnov.

Within 3 km, the terrain around Trutnov has only modest variations in elevation — a maximum elevation change of 200 m around an average of 459 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,027 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,502 m.

The land around Trutnov is covered by trees (41%) and grassland (29%) within 3 km, trees (54%) and grassland (29%) within 16 km, and trees (41%) and cropland (40%) within 80 km.

3 km
200 m
16 km
1,027 m
80 km
1,502 m
treesgrasslandcroplandartificial surfaces
September weather nearby: Dvůr Králové nad Labem 16 km · Náchod 24 km · Kamienna Góra 26 km · Boguszów-Gorce 30 km · Wałbrzych 35 km · Hradec Králové 40 km · Jelenia Góra 40 km · Nowa Ruda 42 km

Czechia travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / E
230 V · 50 Hz
Prices
≈ 59% of US
price level, 2025
GDP per capita
$35,917
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
0.8
per 100k, 2023
Road deaths
5.9
per 100k/yr, 2019
Income group
High
World Bank
English
High
EF EPI 582
Religion
none 48%believers unaffiliated with a religious society 9%Roman Catholic 7%other believers belonging to a church or religious society 6%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Trutnov (50.561°, 15.9127°, elevation 431 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).